TSI Instruments QUESTemp 32 - United States Navy

Appendix B: Heat Exposures Tables
14
United States Navy
Physiological Heat Exposure Limits (PHEL) Time Table
(Without the presence of fuel combustion gases/fuel vapors) is displayed on the
following page.
The recommended working hours are shown based on a maximum of eight hours.
Naval personnel will follow a category, I - VI, based upon their function.
PHEL Curves (Total Exposure Time in Hours: Minutes)
WBGT(F)
I
II
III
IV
V
VI
80.0
>8:00
>8:00
>8:00
8:00
6:35
4:30
81.0
>8:00
>8:00
>8:00
8:00
6:35
4:30
82.0
>8:00
>8:00
8:00
7:05
5:25
3:40
83.0
>8:00
8:00
7:45
6:25
4:55
3:20
84.0
>8:00
8:00
7:05
5:55
4:30
3:05
85.0
8:00
7:45
6:30
5:20
4:05
2:50
86.0
8:00
7:05
5:55
4:55
3:45
2:35
87.0
7:25
6:30
5:25
4:30
3:25
2:20
88.0
6:45
5:55
4:55
4:05
3:10
2:10
89.0
6:10
5:25
4:30
3:45
2:50
2:00
90.0
5:40
5:00
4:10
3:25
2:40
1:50
91.0
5:15
4:35
3:50
3:10
2:25
1:40
92.0
4:50
4:10
3:30
2:55
2:15
1:30
93.0
4:25
3:50
3:15
2:40
2:00
1:25
94.0
4:05
3:35
3:00
2:25
1:50
1:15
95.0
3:45
3:15
2:45
2:15
1:45
1:10
96.0
3:25
3:00
2:30
2:05
1:35
1:05
97.0
3:10
2:45
2:20
1:55
1:25
1:00
98.0
2:55
2:35
2:10
1:45
1:20
0:55
99.0
2:40
2:20
2:00
1:40
1:15
0:50
100.0
2:30
2:10
1:50
1:30
1:10
0:45
101.0
2:20
2:00
1:40
1:25
1:05
0:45
102.0
2:10
1:50
1:35
1:15
1:00
0:40
103.0
2:00
1:45
1:25
1:10
0:55
0:35
104.0
1:50
1:35
1:20
1:05
0:50
0:35
105.0
1:40
1:30
1:15
1:00
0:45
0:30